initscripts/arch-binfmt at master · StarchLinux/initscripts · GitHub

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#!/bin/bash
#
# /usr/lib/initscripts/arch-binfmt
#
# Configure additional binary formats at boot
#

shopt -s nullglob

declare -a binfmt_d
# files given has argv supersede config files
if (( $# > 0 )); then
	for arg; do [[ -r "$arg" ]] && binfmt_d+=("$arg"); done
else
	binfmt_d=(
		/usr/lib/binfmt.d/*.conf
		/etc/binfmt.d/*.conf
		/run/binfmt.d/*.conf
	)
fi

# check there is file to load
(( ${#binfmt_d[@]} > 0 )) || exit 1

# mount binfmt_misc if api filesystem is missing
mountpoint -q /proc/sys/fs/binfmt_misc ||
	mount -t binfmt_misc binfmt /proc/sys/fs/binfmt_misc

# files declared later in the binfmt_d array will override earlier
# Example: `/etc/binfmt.d/foo.conf' supersedes `/usr/lib/binfmt.d/foo.conf'.
declare -A fragments
for path in "${binfmt_d[@]}"; do
	[[ -f $path ]] && fragments[${path##*/}]=$path
done

for path in "${fragments[@]}"; do
	while read -r line; do
		[[ ${line:0:1} == '#' ]] && continue
		printf "%s" "$line" > /proc/sys/fs/binfmt_misc/register
	done < "$path"
done

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